Knob-latch



(No Model.)

B. KNIGHT.

- KNOB Lucia. No. 340,048. Patented Apr. 13,-1886.

WITNESSES INVENTOR v 0. s. $111k 60 M 41 M; g y flu; Affarney n. PETERS. Plwloiiihognphcr. Wnslungin l. n. c.

EDGAR KNIGHT, OF NEAV YORK, N. Y.,

PATENT OFFICE.

ASSIGNOR OF ONE-HALF TO WILLIAM REYNOLDS AND AMOS WV. BUTLER, OF BROOKVILLE, INDIANA.

KNOB-LATCH.

SPECIFICATION forming part of Letters Patent NO. 340,048, dated April 13, 1886.

(No model.)

To all whom, it may concern:

Be it known that I, EDGAR KNIGHT, of the city, county, and State of New York, and a citizen of the United States, have invented a new and useful Improvementin Knob-Latches, of which the following is a. full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to a knob-latch; and it consists in the devices and their combinations, hereinafter particularly described, and as re cited in the claims.

Figure 1 is a side elevation of a portion of a door-stile, showing my improved latch in dotted lines seated therein. Fig. 2 is a horizontal sectional view of the style and knob-latch therein, disclosing the operative mechanism. Fig. 3 is a vertical central section of the latchcase and face-plate. and showing the bolt and its spring in full lines. Fig. 4 is an inner face view of the face-plate detached from thecase; and Fig. 5 is a vertical cross-section of the case. the bolt, and the operating-pinion on the line of the axis of the latter, the case being united to the face-plate.

A is the case. This is cylindrical in form, as shown, and may be-formed of a piece of metal tubing. The edge of the rearward or bottom end is preferably turned inwardly, as at a, to form an annular shoulder, against which rests a disk, (1, whereby this end of the case is effectively and economically closed.

B is the faceplate having on its rearward side the circular-boss b,which is adapted to fit into the forward end of the case. The interior face of the wall of the case at this end is screw-threaded, as at b, and the boss is exteriorly threaded to correspond, whereby the face-plate may be secured to the case by screwing the boss b into the end of the case, as shown in Figs. 2 and 3. The face-plate has the boltslot Z)", located centrally of the screw-boss, through which the bolt is shot.

0 is the bolt, shown with the usual bevel latch end,c,fitted to move in slot b in the faceplate. The body of thebolt has the transverse and interiorly-located slot 0, from one of the walls of which and projecting inwardly of the boltis the rack 0 At the opposite ends of the slotted bolt-body are the annular or cylindrical the turned edge 1:4.

bearings c and 0*, which fit loosely against the interior of the case. The bearing 0 on its forward face is shouldered at c to abut against the base of the screw-boss b, and thus act to limit the forward throw of the bolt, while between the outward or rear face, a and the end plate, a, of the case is the spring D, seated in the case and having bearings against 0 and a, as shown.

At E is shown the actuatingpinion carried by the spindle f. This pinion engages the rack c" on the interior of the bolt-body, as shown, and is operated to retract the bolt by throwing it rearwardly of the case and com- 6 pressing the spring I). WVhen the pinion is released, the spring D-obviously shoots the bolt forward. The pinion is formed with the hubs e and eone on each sideand these hubs are respectively shouldered at e and e" 0 to constitute bearings, one of which enters a slot, at, in the case, and the other of which fits into a slot in a cap, (L3, which is screwed into the slot a in the opposite wall of the case. The slot ain the case is large enough to admit the passage of the largest diameter of the pinion, so that the devices maybe easily put together, and the cap a is countersunk in the face of the case, so that the parts when adjusted will enable the case to present asmooth 8o cylindrical exterior.

The devices, as shown, are put together by first introducing the plate a into the forward end of the case and dropping it flatwise against The spring D is then put in the case and is followed by the bolt, and the face-plate is then screwed into its seat. The pinion is then introduced into the case through the side slot, a, and its hub e is seated in slot a, when the screw-cap a is placed in its seat, 0 its central slot constituting the other bearing of the pinion. The spindle f is now capable of being passed through the angular slot longitudinal of the pinion, and one ormore knobs,

F, may then be attached to the spindle in the usual way.

My described k nob-latch device is peculiarly adapted to be seated readily and speedily in door-stiles and similar places.

In placing the latch in a door-stile the workman has only to use an anger to forma cylindrical recess in the stile of a bore adapted to line of the pinion for the passage and seating of the spindle. The time and labor involved in the cutting of a deep rectangular recess in the stile, as is demanded for ordinary lock and latch cases, is avoided.

My latch as described is economical in structure, simple in mechanism, and effective and durable in application.

It is obvious that the described mechanism for operating the latch may be combined with and used in a case which is angular in crosssection in place of being cylindrical, asset forth.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In a knob-latch. the combination, with the inclosing-case and face-plate, of the latchbolt slotted at c and having the inwardlyp-rojecting rack a, and the shoulder-bearings 0 and c, engaging the wall of the case, the spring D, and the pinion E, having hubseand 6, having bearings in the case and longitudinally slotted to receive the knob-spindle f,

substantially as described, and, for the purpose set forth.

2. In a knob-latch, the combination, with ward end threaded, of a face-plate provided with a threaded boss on its rearward face,

whereby the face-plate may be screwed into and thus seated upon the end of the case, as specified. g

3-. The combination, with the latch-bolt 0, its slot a, rack c", bearings c and c, and pinion E, of spring D, and inelosing-case A, provided with face-plate B and inwardly-turned rearward edges a and disk or end plate, a, as and for the purpose set forth.

4. The combination, ina knoblatch, with the bolt 0, havingatransverse slot, 0, in which is the inwardly-projecting rack c, the operating-pinion E, having hubs 0 ends, and the spring D, of the inclosing-case A, having the slots at and a, and the screw-cap a, together with the face-plate B, as and for the purpose specified.

EDGAR KNIGHT.

\Vitnesses:

A. G. N. VERMILYA,

A. S. FITCH. 

